Quote:
Originally Posted by mazdamx640
... I want to rewire to fuel pump to up the pressure and help the fuel atomize the fuel better.
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The pressure can be raised by simply changing out (or adjusting if it is adjustable) the fuel pressure regulator on the fuel rail.
You don't want to do that--higher pressure means that more fuel goes into the engine per millisecond of injector opening. So unless you have a way to re-map the injection times for all driving conditions, you will simply be making the mixture richer, and burning more fuel.
I think you've probably done just about all that can be done to help your MPG with bigger wiring.
-soD